520723680 has 192 divisors, whose sum is σ = 1732243968. Its totient is φ = 131225600.

The previous prime is 520723597. The next prime is 520723729. The reversal of 520723680 is 86327025.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1114807 + ... + 1115273.

It is an arithmetic number, because the mean of its divisors is an integer number (9022104).

Almost surely, 2^520723680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520723680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (866121984).

520723680 is an abundant number, since it is smaller than the sum of its proper divisors (1211520288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

520723680 is a wasteful number, since it uses less digits than its factorization.

520723680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609 (or 601 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 520723680 is about 22819.3707187556. The cubic root of 520723680 is about 804.5180196728.

The spelling of 520723680 in words is "five hundred twenty million, seven hundred twenty-three thousand, six hundred eighty".